lathrop allen



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d. LATHROP ALLEN, OF NEW YORK, N. Y., ASSIGNOR TO HIMSELF AND MARSHALL LEFFERTS, 0F SAME PLACE.

Letters .Patent-No. 76,373, dated April I, 1868.

IMPROVEMENT IN PAYER-CUTTING MAGHINES.

TO ALL WHOM IT MAY CONGERN:

Bc it known that I, J. LATHROP ALLEN, of the city and State of New York, have invented, made, and applied to use a certain new and useful Improvement in Machinery for Cutting Paper from a. roll into sheets or pieces; and I do hereby declare the'following to be a full, clear, and exact description of the said invention, reference being had to the annexed drawing making part of this specification, wherein- Figure 1 is an elevation of my apparatus, thecutter being shown in =section.

Figure 2 is aplan, with vthe upper feed-roller partially removed and the slides of the knife in section; and

Figure 3 is an end view of the cutters, with one of the spring-cams that operate the moving-knife in section.

Similar marks of reference denote the same parts. I

Heretofore difficulty has been experienced in cutting off paper from -a roll or moving web, because the motion of the paper-.interfered with the-action of the shear, or else the shear stopped the motion=of the paper, rendering it liable to injury, particularly in those cases where the roll ofjpaper was moved by draw-ing upon the paper itself.

The nature of my said linvention consists in a reciprocating shear, moving at the speed, ornearly so, of the paper during the time that the cutting is being effected, said shear being afterwards opened and returning as -the paper continues to pass 4through it, and then again going forward with the paper, and closing to cut it o This invention is4 particularly adapted to the cutting off ,of printed bills, checks, blanks, and other small articles printed by arotary motion Aupon avcontinuous web of paper, but the same may benused for cutting oif sheets of papel' or similar material from a web or roll, wherever available.

In the drawing, a is a. bed, carrying in suitable supports a roller, IJ,- tbat is moved by suitable power., and becomes the measure of the length of the sheet ofl paper, or it mayjalso be-thc rotary type-cylinder for printing. c is a roller, between which and the cylinder b the paper passes, as indicated by red lines.v d is a shaft.; it may be the shaft of the roller c, or separate therefrom; andthe gear-wheels e eudfcause-the rotation of this shaft d the desired number of times for each revolution of the roller or cylinder b. `These wheels e andf may be changeable, so as to vary the size of the sheet out off, because the sheet of paper depends for its length upon the size of the cylinder bland the number of revolutions of the shaft eZ for each revolution lof the cylinder .6, a sheketcof paper being cut Off each revolution ofthe shaft d. At the ends of the shaft d are adjustable cranks h h, with adjustable connectingrods, e', to the sliding-shear bedg, on which is a pair of vertical slides, k, carrying the moving knife Z, that acts against the fixed blade m to form the shear.

The blade] is raised by the spring n, and is closed, as it moves along with the bed g, by the .projecting iin'gers'p, running under the inclines o'o, or other suitable standing projections that depress the said shear as it moves away from the cylinder b, and allow .it to be raised so as to return open. I have shown the inclines o, as set on springslides, s, in the frames 1',so that the fingers p, as they return over the inclines o, will depress them, and said inclines spring up again.

By adjusting the length of the cranks i, the speed of the carriage g, at the point where the cutting is effected, can h'e made to correspond with the speed of the paper as it is delivered between the rollers b c. By adjusting the length of the rods it', and the position of the cams or inclines o, the cut can be made at any desired point, so as to correspond with any printing there may beon the web.

In order to facilitate the construction of the shear and the keeping of .it ingood' condition, I make the bla-de n t comparatively -thin, so as to be easily groundwith a straight edge, and I make the blade l also rather thin, and attach it to its stock by the screws 2 2, and I provide screws 3 3, by means of which the cutting-edge can be adjusted tov the necessary position to cut againsty the shear m.

What I claim, and desire to secure by Letters Patent, is-

Providing the reciprocating shear, having fixed inclines for closing the shear, with adju-stable links and cranks for reciprocating said shear, substantially as set forth;

In witness whereof, I have hereuntovset my signature, this sixth day of November, A. D. 1867.

Y J. LATHROP ALLEN.

Witnesses:

GEO. BENNETT WALKER, Gmo. Trios. PINCKNEY. 

